{"data":{"id":"us/30-cfr-70.211","jurisdiction":"us","citation":"30 CFR 70.211","heading":"Respirable dust samples; report to operator; posting.","body":"(a) MSHA shall provide the operator, as soon as practicable, a report with the following data on respirable dust samples submitted or whose results were transmitted electronically, if using a CPDM, in accordance with this part:\n(1) The mine identification number;\n(2) The locations within the mine from which the samples were taken;\n(3) The concentration of respirable dust, expressed as an equivalent concentration for each valid sample;\n(4) The average equivalent concentration of respirable dust for all valid samples;\n(5) The occupation code, where applicable; and\n(6) The reason for voiding any sample.\n(b) Upon receipt, the operator shall post this data for at least 31 days on the mine bulletin board.\n(c) If using a CPDM, the person certified in sampling shall, within 12 hours after the end of each sampling shift, print, sign, and post on the mine bulletin board a paper record (Dust Data Card) of the sample run. This hard-copy record shall include the data entered when the sample run was first programmed, and the following:\n(1) The mine identification number;\n(2) The locations within the mine from which the samples were taken;\n(3) The concentration of respirable dust, expressed as an equivalent concentration reported and stored for each sample;\n(4) The sampling status conditions encountered for each sample; and\n(5) The shift length.\n(d) The information required by paragraph (c) of this section shall remain posted until receipt of the MSHA report covering these respirable dust samples.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","PART 70—MANDATORY HEALTH STANDARDS—UNDERGROUND COAL MINES","Subpart C—Sampling Procedures"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"6287e80f5c2ef6a3ae8ae884209b61978756777eeed1bd59f2c6f367a0432cc4","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-70.210","next":"us/30-cfr-70.212"},"notice":"GroundRules: Original legal text. Not legal advice."}